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pryor just keep all your clean washed veggie peelings in a mesh bag in the freezer. Keep adding to it. I had broccoli stems, asparagus stems, carrot , potato, sweet potato peelings, onion skins, brussel sprout leaves, list is endless. Added parsley sprigs, basil leaves, thymr, oregano. Peppercorns, kosher salt. I did it in the Instantpot slowcooker for 24 hrs, set it for 12 hrs then it was on keep warm for 12 hrs, only because I was busy and didn't have time to deal with it. Poured it into a big strainer and let it drain into a big bowl for an hour the put it into mason jars and once cooled put into the deep freeze.